CVE-2021-26923 : Security Advisory and Response

An issue was discovered in Argo CD before 1.8.4 that exposes internal information when accessing the endpoint /api/version without proper authentication.

Understanding CVE-2021-26923

This CVE refers to a vulnerability found in Argo CD versions prior to 1.8.4 that could potentially leak sensitive system details through an unprotected endpoint.

What is CVE-2021-26923?

The CVE-2021-26923 vulnerability in Argo CD exposes internal information when the /api/version endpoint is accessed without authentication measures in place. This could lead to unauthorized access to sensitive system data.

The Impact of CVE-2021-26923

The impact of this vulnerability is significant as it allows attackers to gather internal system information without proper authentication, potentially leading to further exploitation or unauthorized access.

Technical Details of CVE-2021-26923

Argo CD versions prior to 1.8.4 are affected by this vulnerability, allowing unauthorized access to internal system information.

Vulnerability Description

Accessing the /api/version endpoint in Argo CD before version 1.8.4 can expose sensitive system details due to lack of authentication protection.

Affected Systems and Versions

All Argo CD versions before 1.8.4 are vulnerable to this security issue.

Exploitation Mechanism

By simply accessing the /api/version endpoint, attackers can retrieve internal system information without the need for proper authentication, making it a serious security concern.

Mitigation and Prevention

To address CVE-2021-26923 and enhance system security, immediate action and long-term security practices should be implemented.

Immediate Steps to Take

Upgrade Argo CD to version 1.8.4 or newer to mitigate the vulnerability.
Implement access controls and authentication mechanisms to secure the /api/version endpoint.

Long-Term Security Practices

Regularly update and patch Argo CD to the latest versions to prevent known vulnerabilities.
Conduct security audits and assessments periodically to identify and address any security gaps.

Patching and Updates

Stay informed about security advisories and updates from Argo CD to promptly apply patches and maintain a secure system.